ternary_frame: Ternary frame for compositional data (D = 3)
In coda.plot: Plots for Compositional Data

View source: R/ternary_diagram.R

ternary_frame

R Documentation

Ternary frame for compositional data (D = 3)

Description

Build a ternary plotting frame for compositional data with exactly three parts. The returned object stores the geometric and log-ratio transformation machinery needed to add multiple data layers consistently to the same ternary diagram.

Usage

ternary_frame(X, center = FALSE, scale = FALSE, labels = NULL)

Arguments

`X`	A numeric matrix or data frame with exactly three columns. This data defines the reference frame used for centering/scaling in log-ratio space.
`center`	Logical. If `TRUE`, center log-ratio coordinates using the mean coordinates of `X`. Default is `FALSE`.
`scale`	Logical or numeric. If `FALSE`, no scaling is applied. If `TRUE`, log-ratio coordinates are scaled by their empirical standard deviations. If a single positive numeric value is supplied, centered log-ratio coordinates are multiplied by that value.
`labels`	Optional character vector of length 3 used as corner labels. If `NULL`, `colnames(X)` are used when available. Otherwise, temporary labels `c1`, `c2`, `c3` are used.